@nprofile1q... To answer your second question. There’s no technical benefit to having a PUA encoding with parallel ranges for upper- and lowercase, but it can be helpful for people implementing the encoding in fonts or keyboards, as it makes it easier to remember the codes. For the same reason, it is helpful if the first letter is assigned to a codepoint ending in 1. [If the script involves its own digits, it is also helpful if these are assigned to codepoints with sequential 0-9 endings.]